linux-kernel - [PATCH v4 7/9] remoteproc: Refactor function rproc_trigger_auto

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon,  1 Jun 2020 11:51:37 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     bjorn.andersson@...aro.org, ohad@...ery.com
Cc:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        loic.pallardy@...com, arnaud.pouliquen@...com, s-anna@...com
Subject: [PATCH v4 7/9] remoteproc: Refactor function rproc_trigger_auto_boot()

Refactor function rproc_trigger_auto_boot() to properly deal
with scenarios where the remoteproc core needs to attach with a
remote processor that has already been booted by an external
entity.

Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
 drivers/remoteproc/remoteproc_core.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 48ddc29814be..d32ac8f0c872 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1586,6 +1586,15 @@ static int rproc_trigger_auto_boot(struct rproc *rproc)
 {
 	int ret;
 
+	/*
+	 * Since the remote processor is in a detached state, it has already
+	 * been booted by another entity.  As such there is no point in waiting
+	 * for a firmware image to be loaded, we can simply initiate the process
+	 * of attaching to it immediately.
+	 */
+	if (rproc->state == RPROC_DETACHED)
+		return rproc_boot(rproc);
+
 	/*
 	 * We're initiating an asynchronous firmware loading, so we can
 	 * be built-in kernel code, without hanging the boot process.
-- 
2.20.1